47784 has 32 divisors (see below), whose sum is σ = 131040. Its totient is φ = 14400.

The previous prime is 47779. The next prime is 47791. The reversal of 47784 is 48774.

47784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is an unprimeable number.

47784 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 354.

It is an arithmetic number, because the mean of its divisors is an integer number (4095).

2⁴⁷⁷⁸⁴ is an apocalyptic number.

47784 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65520).

47784 is an abundant number, since it is smaller than the sum of its proper divisors (83256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47784 is a wasteful number, since it uses less digits than its factorization.

47784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 197 counting only the distinct ones).

The product of its digits is 6272, while the sum is 30.

The square root of 47784 is about 218.5955168799. The cubic root of 47784 is about 36.2878162634.

Subtracting 47784 from its reverse (48774), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 477 and 84, that added together give a triangular number (561 = T₃₃).

The spelling of 47784 in words is "forty-seven thousand, seven hundred eighty-four".